Fix DISPLAY_MSG macros so that it can accept only one parameter
Fix DISPLAY_MSG macros so that it can accept only one parameter

pokyfudywise/HoudiniEngineForMaya,sideeffects/HoudiniEngineForMaya,sideeffects/HoudiniEngineForMaya,pokyfudywise/HoudiniEngineForMaya,pokyfudywise/HoudiniEngineForMaya,sideeffects/HoudiniEngineForMaya